I like this list, I like that Sketch is #2, and #1 is an OSS self-hostable solution, https://penpot.app/ -- https://github.com/penpot so we can't quite get burned like we did with Figma.
From some cursory review, it seems pretty good! And there's now effort underway to be able to import Figma files.
edit: okay, I've gotten signed up with penpot, made rudimentary sketches, it seems solid and promising. I'm now a fan and I think this seals the deal for me, I'm glad that it was an easy decision. And I will give them the benefit of the doubt when it's not exactly up to par because 1) they seem to be new and characterize themselves as still being in beta and 2) it's self-hostable OSS and the inherent security of this offering is something I value deeply.
From some cursory review, it seems pretty good! And there's now effort underway to be able to import Figma files.
edit: okay, I've gotten signed up with penpot, made rudimentary sketches, it seems solid and promising. I'm now a fan and I think this seals the deal for me, I'm glad that it was an easy decision. And I will give them the benefit of the doubt when it's not exactly up to par because 1) they seem to be new and characterize themselves as still being in beta and 2) it's self-hostable OSS and the inherent security of this offering is something I value deeply.